On Tuesday, the 23-year-old got his first Major League hit, an infield single.

On Wednesday, Liriano got a little more mileage out of his next hit, a 427-foot laser into the restaurant that sits on the third deck -- that's right, the third deck -- of the Western Metal Supply Co. Building down the left-field line at Petco Park.

"That was a good one," said Padres manager Bud Black. "I like the fact that he got to an inside fastball. He turned on that one. We know he's got the raw power."

The home run for Liriano, coming in just his eighth plate appearance and in his third big league game, gave the Padres a 3-1 lead over the Rockies in the fourth inning of an eventual 5-3 victory for a series sweep.

"It feels great. I feel excited to crush that homer," Liriano said. "It was a fastball in. I feel really comfortable. I feel really good. Some people say I never hit the fastball in, [so] it made me feel really good to hit that fastball. I'm hitting with a lot of power right now. It was different in the Minor Leagues. I feel really great with my power here."

Liriano, who was promoted from Triple-A before Monday's game, started the season with Double-A San Antonio, hitting .264 with 14 home runs and 63 RBIs in 99 games before earning a promotion to El Paso, where he hit .452 in 16 games.

Liriano entered Wednesday with 54 professional home runs since beginning his career in 2008 after he signed with the team as a 16-year-old out of the Dominican Republic in '07.

Randy Smith, the team's vice president of player development, signed Liriano when he was one month past his 16th birthday after a two-day workout in the Dominican Republic. Smith made it back home to Phoenix just in time Wednesday to see the home run live on television.

"He had a live, athletic body … even back then," Smith said. "He always had tremendous physical skills. He had great bat speed. It was fun to see what he did today."

Corey Brock is a reporter for MLB.com. Keep track of @FollowThePadres on Twitter. This story was not subject to the approval of Major League Baseball or its clubs.